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This paper presents the results of simulation of several model based and model free attitude controllers of quad-rotor UAVs with an aim to find a simple and effective one suitable for the UAV developed in our lab. The backgrounds of the controllers are also described.
Distributed virtual simulation is a capability that is increasing in demand within the automotive manufacturing industry. The distributed and networked approach to system level design and simulation stands to benefit from a unifying relational oriented modeling and simulation framework due to the large number of simulation technologies that must be integrated. This will also permit innovative use...
The relationships between X-parameters of a given transistor and a second transistor geometrically scaled with respect to the first are derived and presented for the first time. The different types of X-parameters scale differently. These relationships enable X-parameters measured on a fixed size of transistor, diode, or other similar test structure to be scaled to other sizes and produce X-parameter...
The H∞ filtering problem is considered for a class of nonlinear discrete-time systems for which a novel solution is developed by embedding the unscented transform technique into the extended H∞ filter structure. This article compares a Scale Unscented Transform H∞ filter (SUT H∞ - ) and UKF for the bearings-only tracking problem in Modified Polar Coordinates (MPC) and Cartesian coordinates (CC). Its...
Unmanned underwater vehicles have various missions within civilian, military and academic sectors. They have the ability to explore areas unavailable to manned assets and to perform duties that are risky to humans. In particular, UUVs have the ability to perform bearings-only tracking in shallow areas near shorelines. This article compares a Logarithmic Polar Coordinates EKF (LPC-EKF) and Logarithmic...
This paper reviews and contrasts two complementary device modeling approaches based on data readily obtainable from a nonlinear vector network analyzer (NVNA). The first approach extends the application of waveform data to improve the characterization, parameter extraction, and validation methodologies for “compact” transistor models. NVNA data is used to train artificial neural network -based constitutive...
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